Current Monitors Suit Power Supply Applications

Diodes Incorporated has introduced a family of six high-reliability current monitors for 40V and 60V operation, designed for power supply, automotive load dump and SELV circuit applications. The ZXCT108X devices detect current in a high side sense resistor and reference it to ground, thereby reducing system circuit complexity and cost. Their wide supply and common-mode voltage range suits many applications. For industrial and computer power supply applications, the ZXCT1083, ZXCT1085 and ZXCT1087 support a voltage range of 2.7V to 40V.

The ZXCT1082, ZXCT1084 and ZXCT1086, rated for 2.7V to 60V operation, handle automotive load dump and SELV circuits. With independent supply and common-mode voltage inputs, the current monitors permit currents to be measured beyond the limits of normal power supply rails. Their low quiescent current of 0.6uA means associated measurement errors are reduced. The product line offers users the option of both fixed and programmable gain.

Providing a fixed voltage gain of 25 are the ZXCT1084 and ZXCT1085, while for the ZXCT1086 and ZXCT1087 the gain is 50. The ZXCT1082 and ZXCT1083 use three external gain setting resistors, which increase versatility by enabling wide gain ranges and optimisation of bandwidths. The current monitors are provided in the small footprint SOT25 package and use green mould compound. An extended industrial temperature range of -40C to 125C supports use in automotive and higher temperature scenarios.

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